Alert archive / Indiana / Special Weather Statements in 2017

Special Weather Statement, NWS Wilmington, OH

July 7, 2017Union County, Indiana

NWS Wilmington, OH issued this special weather statement at Jul 7, 2017, 4:32 PM EDT for Union County, Indiana. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 7, 2017, 4:32 PM EDT (20:32 UTC)
Expired: Jul 7, 2017, 5:00 PM EDT
In force: 28 min
Issued by: NWS Wilmington, OH

County Union County, IN

The radar

The Cincinnati radar (KILN), 100 km from the middle of the area, began a volume at 20:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 101 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 678 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before this special weather statement went out at Jul 7, 4:30 PM EDT, 2 minutes earlier.

Area forecast discussion, Jul 7, 4:30 PM EDT, 2 minutes before

Area Forecast Discussion
National Weather Service Wilmington OH
430 PM EDT Fri Jul 7 2017

.SYNOPSIS...
A cold front from the northwest will bring showers and
thunderstorms to the region today with the potential for some
storms to be severe. High pressure will follow the front,
providing dry weather for Saturday and Sunday. A series of upper
level disturbances will move across the region Monday through
Wednesday providing a chance of showers and thunderstorms each
day.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
A line of showers and thunderstorms that formed this morning has
pushed southeast and is currently approaching Hillsboro. An
outflow boundary from the earlier convection now extends from
the central of the CWA northwest towards Lake Michigan (as seen
on radar and GOES R). ML Cape values on the SPC mesoanalysis
are between 1000 and 1500 J/kg which matches up nicely with the
07.18z KILN sounding. DCAPE ahead of the line is around 1400 J/
kg with SFC - 6 km shear around 35 kts. Low level lapse rates
also remain favorable at 7 degrees C/ km. Given the extending
outflow and existing instability see no reason why ongoing
development upstream won't continue to work its way southeast
along the old outflow. Also, with the parameters above the
threat for severe weather will continue through the afternoon
into evening. Shear is sufficient to support cellular
organization initially with a linear feature being the most
probable outcome. Hail and wind will the primary threats
initially with individual cells. The primary threat will then
transition to damaging winds as cell mergers occur.

By later this evening the mid level ridging across the mountain
west will continue to amplify with the upper level through axis
swinging through Indiana. The 850 mb front is then forecasted
to swing through late this evening which should finally help to
bring an end to the showers and thunderstorms. The surface cold
front in association with the upper level trough axis will pass
through the CWA this evening and clear the CWA Saturday morning.
The 850 mb front and much lower PWAT air will be right on its
heels with PWATs falling from around 1.70" to around 0.79"
Saturday morning.

The back side of the trough axis remains more across the midwest
though and surface high pressure will initially build in across
the plains Saturday morning. The pressure gradient does remain
slightly elevated Saturday morning, but with saturated ground
fog looks possible. Overall have discounted the effect of the
light wind and think the falling dewpoints will lag slightly
behind the cold front.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/...
A surface cold front will be pushing southeast of the CWA
Saturday morning with drier air slowly working into the region.
Some high res models and global models (GFS/ NAM/ NMM) are
trying to indicate some weak showers forming Saturday afternoon
as another weak shortwave rotates around the trough axis.
Looking at forecast soundings does reveal a layer of saturation
around 800 mb, but the layer does appear thin. Above this
saturation layer (700 to 200 mb) significant dry air
encroaches from the north. The ILN CWA also lies on the
covergent side of the upper level trough axis. Due to the
mentioned above have kept the forecast area dry Saturday.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...
West northwest upper level flow between a long wave trough over
eastern Canada and high pressure in the central/southern Plains will
prevail through the week. This will set the stage for a convectively
active period. The chance of showers and thunderstorms will increase
Monday into Tuesday as a front lays out across the lower Great
Lakes. Appears that there will be a lull in activity around mid
week. The chance of storms returns Thursday into Friday as another
weak boundary sags towards the region.

Temperatures will warm to near or above normal after Sunday with
more humid conditions also returning and then persisting through the
week.

&&

.AVIATION /20Z FRIDAY THROUGH WEDNESDAY/...
A line of showers and thunderstorms continue to approach the
TAF sites this afternoon ahead of a mid level shortwave. During
the afternoon this line of showers and thunderstorms will
dive southeast and affect the TAF sites (except KCVG/ KLUK).
The outflow from these storms can then be seen extending
northwest towards Lake Michigan (seen on GOES R). It is likely
that the ongoing convection currently just southeast of Lake
Michigan will likely dive southeast towards KCVG/ KLUK.

In the line of showers and thunderstorms gusts of 30 to 50 kts
will be possible with restrictions in visibilities to LIFR. The
second line will likely clear the TAF sites this evening. A cold
front will then dive southeast through the TAF sites late this
evening with high pressure slowly building in from the north.
High res guidance continues to also advertise restricted
visibilities/fog near the Indiana/ Ohio state line Saturday
morning which looks likely given the wet ground and light winds.
Have added a mention of fog into KLUK for now with restrictions
in visibilities possibly needed at KCVG and KDAY.

Saturday morning after any fog lifts, northwest winds with VFR
conditions can be expected.

OUTLOOK...No significant weather is expected.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...None.
KY...None.
IN...None.

&&

SYNOPSIS...Haines
NEAR TERM...Haines
SHORT TERM...Haines
LONG TERM...
AVIATION...Haines

Hazardous weather outlook, Jul 7, 11:12 AM EDT, 5 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Wilmington OH
1112 AM EDT Fri Jul 7 2017

INZ066-073>075-080-KYZ089>100-OHZ070>074-077>082-088-081515-
Franklin IN-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone-
Kenton-Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-
Butler-Warren-Clinton-Ross-Hocking-Hamilton-Clermont-Brown-Highland-
Adams-Pike-Scioto-
1112 AM EDT Fri Jul 7 2017

This Hazardous Weather Outlook is for Southeast Indiana, Northeast
Kentucky, Northern Kentucky, Central Ohio and Southwest Ohio.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms are forecast to develop this afternoon and evening.
Some of these storms may become severe, with a threat for damaging
winds and large hail.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-081515-
Wayne-Fayette IN-Union IN-Hardin-Mercer-Auglaize-Darke-Shelby-Logan-
Union OH-Delaware-Miami-Champaign-Clark-Madison-Franklin OH-Licking-
Preble-Montgomery-Greene-Fayette OH-Pickaway-Fairfield-
1112 AM EDT Fri Jul 7 2017

This Hazardous Weather Outlook is for East Central Indiana, Central
Ohio and West Central Ohio.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms are forecast to develop this afternoon and evening.
Some of these storms may become severe, with a threat for damaging
winds and large hail.

Some storms also have the potential for heavy rain. Flash flooding
will be possible in some of the heavier storms or where training
occurs.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

In the hours before

Special weather statement, Jul 7, 3:47 PM EDT, 45 minutes before

Special Weather Statement
National Weather Service Wilmington OH
347 PM EDT FRI JUL 7 2017

INZ050-072015-
Wayne IN-
347 PM EDT FRI JUL 7 2017

...A STRONG THUNDERSTORM WILL AFFECT WAYNE COUNTY UNTIL 415 PM EDT...

At 347 PM EDT, radar indicated a strong thunderstorm 11 miles
southeast of Muncie, moving southeast at 30 mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Nickel size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...

Locations impacted include...
Richmond, Centerville, Hagerstown, Fountain City, Franklin, Abington,
Greens Fork, Spring Grove, Bethel, Economy, Boston, Whitewater.

This includes the following Interstates...
 I-70 in Indiana between mile markers 138 and 156.

Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 4000 8520 4000 8481 3973 8481 3973 8497
      3989 8520
TIME...MOT...LOC 1947Z 302DEG 27KT 4007 8525

Sites

Local storm report, Jul 7, 3:58 PM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
358 PM EDT FRI JUL 07 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0144 PM     TSTM WND DMG     2 ESE SUNBURY           40.24N 82.83W
07/07/2017                   DELAWARE           OH   LAW ENFORCEMENT

            REPORTS OF MULTIPLE TREES DOWN IN PORTER TOWNSHIP, GENOA
            TOWNSHIP, AND HARLEM TOWNSHIP. TIME ESTIMATED FROM RADAR.

&&

JGIBSON

Special weather statement, Jul 7, 4:09 PM EDT, 23 minutes before

Special Weather Statement
National Weather Service Wilmington OH
409 PM EDT FRI JUL 7 2017

OHZ073-082-072045-
Pike OH-Ross OH-
409 PM EDT FRI JUL 7 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN PIKE AND
SOUTHEASTERN ROSS COUNTIES UNTIL 445 PM EDT...

At 409 PM EDT, radar indicated a strong thunderstorm over Waverly,
moving east at 25 mph.

STORM HAZARDS INCLUDE...
Winds to 40 mph...
Penny size hail...

Locations impacted include...
Waverly, Piketon, Beaver, Givens, Pike County Airport, Richmond Dale,
Linn, Lake White and Omega.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3917 8277 3917 8278 3903 8280 3903 8303
      3920 8303 3925 8276
TIME...MOT...LOC 2009Z 252DEG 22KT 3914 8298

Sites

Special weather statement, Jul 7, 4:12 PM EDT, 20 minutes before

Special Weather Statement
National Weather Service Wilmington OH
412 PM EDT FRI JUL 7 2017

INZ050-059-OHZ042-060-072045-
Union IN-Wayne IN-Darke OH-Preble OH-
412 PM EDT FRI JUL 7 2017

...A STRONG THUNDERSTORM WILL AFFECT WAYNE AND NORTHEASTERN UNION
COUNTIES IN EAST CENTRAL INDIANA...NORTHWESTERN PREBLE AND
SOUTHWESTERN DARKE COUNTIES IN WEST CENTRAL OHIO UNTIL 445 PM EDT...

At 412 PM EDT, radar indicated a strong thunderstorm over Hagerstown,
moving southeast at 25 mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Nickel size hail...
Frequent cloud-to-ground lightning...

Locations impacted include...
Richmond, Centerville, Hagerstown, New Paris, New Madison, Fountain
City, Abington, Wayne Lakes, Greens Fork, East Germantown, Spring
Grove, Bethel, Hollansburg, Palestine, Economy, Boston, Whitewater,
Richmond Municipal Airport, Witts Station and Middleboro.

This includes the following Interstates...
 I-70 in Indiana between mile markers 134 and 156.
 I-70 in Ohio between mile markers 0 and 3.

Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3987 8520 3995 8520 4000 8515 4000 8481
      4010 8481 4005 8462 3967 8485 3986 8522
      3987 8522
TIME...MOT...LOC 2012Z 301DEG 23KT 3992 8511

Novak

Special weather statement, Jul 7, 4:15 PM EDT, 17 minutes before

Special Weather Statement
National Weather Service Wilmington OH
415 PM EDT FRI JUL 7 2017

OHZ061-072045-
Montgomery OH-
415 PM EDT FRI JUL 7 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN MONTGOMERY COUNTY UNTIL
445 PM EDT...

At 415 PM EDT, radar indicated a strong thunderstorm near West
Carrollton, moving east at 20 mph.

STORM HAZARDS INCLUDE...
Winds to 30 mph...
One half inch diameter hail...

Locations impacted include...
Dayton, Kettering, Trotwood, Miamisburg, Springboro, Moraine,
Oakwood, West Carrollton, Riverside, Germantown, New Lebanon,
Farmersville, Centerville, Drexel, Woodbourne-Hyde Park and
Overlook-Page Mano.

This includes I-75 in Ohio between mile markers 42 and 54.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3980 8433 3976 8410 3958 8412 3958 8418
      3959 8424 3968 8443
TIME...MOT...LOC 2015Z 286DEG 18KT 3970 8432

Novak

Special weather statement, Jul 7, 4:32 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Wilmington OH
432 PM EDT FRI JUL 7 2017

INZ050-058-059-OHZ060-072100-
Fayette IN-Union IN-Wayne IN-Preble OH-
432 PM EDT FRI JUL 7 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WAYNE...UNION...
NORTHEASTERN FAYETTE COUNTIES IN EAST CENTRAL INDIANA AND
SOUTHWESTERN PREBLE COUNTIES IN WEST CENTRAL OHIO UNTIL 500 PM EDT...

At 432 PM EDT, radar indicated a strong thunderstorm near
Centerville, moving southeast at 25 mph.

STORM HAZARDS INCLUDE...
Winds to 40 mph...
Nickel size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...

Locations impacted include...
Connersville, Liberty, West College Corner, Salem, Waterloo,
Abington, Brownsville, College Corner, Whitewater State Park,
Fairhaven, Goodwins Corner, Mettel Field, Clifton, Cottage Grove,
Kitchel, Philomath, Beesons and Springersville.

Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3982 8510 3962 8473 3957 8480 3957 8481
      3954 8484 3972 8521
TIME...MOT...LOC 2032Z 307DEG 21KT 3974 8507

Novak

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 7:32 AM EDT	Special Weather Statement	ILN	Hardin	28 min
Jul 7, 11:28 AM EDT	Special Weather Statement	ILN	Mercer	32 min
Jul 7, 11:32 AM EDT	Special Weather Statement	ILN	Hardin	28 min
Jul 7, 11:49 AM EDT	Special Weather Statement	ILN	Mercer	26 min
Jul 7, 11:57 AM EDT	Special Weather Statement	ILN	Hardin	33 min
Jul 7, 11:59 AM EDT	Special Weather Statement	ILN	Auglaize, Mercer	31 min
Jul 7, 12:15 PM EDT	Special Weather Statement	ILN	Darke	30 min
Jul 7, 12:31 PM EDT	Special Weather Statement	ILN	Logan, Shelby	29 min
Jul 7, 12:39 PM EDT	Special Weather Statement	ILN	Miami	36 min
Jul 7, 12:44 PM EDT	Special Weather Statement	ILN	Union	31 min
Jul 7, 12:59 PM EDT	Special Weather Statement	ILN	Champaign	31 min
Jul 7, 1:08 PM EDT	Severe Thunderstorm Warning	ILN	Delaware	35 min
Jul 7, 1:19 PM EDT	Special Weather Statement	ILN	Delaware, Union	26 min
Jul 7, 1:23 PM EDT	Special Weather Statement	ILN	Licking	37 min
Jul 7, 1:43 PM EDT	Special Weather Statement	ILN	Clark, Franklin, Madison, Montgomery, Preble	32 min
Jul 7, 1:49 PM EDT	Severe Thunderstorm Warning	ILN	Delaware, Franklin, Licking	26 min
Jul 7, 1:55 PM EDT	Special Weather Statement	ILN	Licking	35 min
Jul 7, 1:58 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Licking	47 min
Jul 7, 2:14 PM EDT	Special Weather Statement	ILN	Fairfield, Fayette, Pickaway	31 min
Jul 7, 2:25 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Franklin, Hocking, Pickaway	36 min
Jul 7, 2:43 PM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Hocking	47 min
Jul 7, 2:48 PM EDT	Special Weather Statement	ILN	Hocking	27 min
Jul 7, 3:16 PM EDT	Special Weather Statement	ILN	Highland, Hocking, Ross	29 min
Jul 7, 4:09 PM EDT	Special Weather Statement	ILN	Pike	36 min
Jul 7, 4:15 PM EDT	Special Weather Statement	ILN	Montgomery	30 min
Jul 7, 4:18 PM EDT	Severe Thunderstorm Warning	ILN	Darke, Preble	42 min
Jul 7, 4:45 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Montgomery, Preble	45 min
Jul 7, 5:09 PM EDT	Areal Flood Advisory	ILN	Preble	3 hr
Jul 7, 5:18 PM EDT	Tornado Warning	ILN	Butler, Montgomery, Preble	27 min
Jul 7, 5:28 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Preble	32 min
Jul 7, 5:31 PM EDT	Special Weather Statement	ILN	Preble	14 min
Jul 7, 5:38 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Montgomery, Preble, Warren	52 min
Jul 7, 5:52 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Hamilton, Warren	38 min
Jul 7, 5:56 PM EDT	Special Weather Statement	ILN	Clinton	34 min
Jul 7, 5:57 PM EDT	Areal Flood Advisory	ILN	Butler, Montgomery, Preble, Warren	3 hr
Jul 7, 6:02 PM EDT	Severe Thunderstorm Warning	ILN	Butler, Hamilton	43 min
Jul 7, 6:14 PM EDT	Severe Thunderstorm Warning	ILN	Brown, Clermont, Clinton, Hamilton, Highland, Warren	46 min
Jul 7, 6:20 PM EDT	Severe Thunderstorm Warning	ILN	Clermont, Hamilton	40 min
Jul 7, 6:35 PM EDT	Severe Thunderstorm Warning	ILN	Adams, Brown, Highland, Pike, Ross, Scioto	40 min
Jul 7, 6:40 PM EDT	Areal Flood Warning	ILN	Preble	6 hr
Jul 7, 7:00 PM EDT	Special Weather Statement	ILN	Brown	30 min
Jul 7, 7:11 PM EDT	Severe Thunderstorm Warning	ILN	Adams, Pike, Ross, Scioto	34 min
Jul 7, 7:15 PM EDT	Areal Flood Advisory	ILN	Pike, Scioto	3 hr
Jul 7, 7:42 PM EDT	Severe Thunderstorm Warning	ILN	Adams, Scioto	33 min
Jul 7, 6:49 PM EDT	Special Weather Statement	ILN	Gallatin, Kenton	26 min
Jul 7, 6:58 PM EDT	Special Weather Statement	ILN	Pendleton	32 min
Jul 7, 7:29 PM EDT	Special Weather Statement	ILN	Bracken, Lewis, Mason	31 min
Jul 7, 7:31 PM EDT	Special Weather Statement	ILN	Carroll, Grant, Owen, Pendleton, Robertson	29 min
Jul 7, 7:52 PM EDT	Special Weather Statement	ILN	Lewis, Mason	23 min
Jul 7, 3:47 PM EDT	Special Weather Statement	ILN	Wayne	28 min
Jul 7, 4:12 PM EDT	Special Weather Statement	ILN	Wayne	33 min
Jul 7, 4:47 PM EDT	Special Weather Statement	ILN	Wayne	28 min
Jul 7, 4:54 PM EDT	Areal Flood Advisory	ILN	Wayne	3 hr
Jul 7, 4:57 PM EDT	Special Weather Statement	ILN	Fayette, Union	33 min
Jul 7, 5:22 PM EDT	Special Weather Statement	ILN	Union	23 min
Jul 7, 5:49 PM EDT	Special Weather Statement	ILN	Franklin	26 min
Jul 7, 6:06 PM EDT	Special Weather Statement	ILN	Franklin	24 min

Nearby

Special Weather Statements in Indiana, 2017 Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.